期刊
IONICS
卷 25, 期 10, 页码 4925-4933出版社
SPRINGER HEIDELBERG
DOI: 10.1007/s11581-019-03061-x
关键词
Asymmetric supercapacitor; Electrode material; Graphene; Iron oxide; Manganese sulfide
资金
- Natural Science Foundation [20181BAB206012]
- Foundation of the Educational Commission of Jiangxi Province [GJJ170579]
- School Foundation of Nanchang Hangkong University [EA201701386]
Energy density and power density are two key parameters of the supercapacitor. Selecting suitable positive electrode materials and negative electrode materials to construct asymmetric supercapacitor is an effective way to improve energy density. Here, a novel asymmetric supercapacitor was assembled by using alpha-Fe2O3/rGO nanocomposites as negative electrode and alpha-MnS/rGO nanocomposites as positive electrode. The fabricated alpha-MnS/rGO//alpha-Fe2O3/rGO asymmetric supercapacitors (ASCs) showed a largest potential window of 1.6 V when 3 M KOH was used as electrolyte. The ASCs displayed a maximum specific capacitance of 161.7 F g(-1) at a current density of 1 A g(-1), and the highest energy density of 57.5 Wh kg(-1) at the power density of 800 W kg(-1). These encouraging performances of the alpha-MnS/rGO//alpha-Fe2O3/rGO ASCs shed light on the use of alpha-Fe2O3/rGO nanocomposites and alpha-MnS/rGO nanocomposites as promising candidate materials for asymmetric supercapacitor applications.
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